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The simple answer is none. However magnetic fields will take the path of least resistance; soft iron does not retain magnetism and offers a path of lower resistance than air so it will tend to divert a field from travelling through whatever it surrounds. If the field is strong then the magnetic shield will have to be more massive.
Mu metal is a name of a low retentivity iron product. Other ferrous and nickel alloys will offer some protection.
If the source of the magnetism is a point then the field strength will diminish by approx. the square of the distance from the source, so double the distance and the force is reduced to a quarter.
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What makes iridium-copper alloy powerful so much so that it attracts rice grains or stop car engine?
Iridium-copper alloy is highly dense and has strong magnetic properties due to the presence of iridium. These properties can create a strong electromagnetic field, which can cause magnetic materials such as rice grains or certain electronic components in a car engine to be attracted or disrupted.
Can magnetism be shielded?
Mu-metal does a pretty good job for smaller fields, but completely shielding something from a magnetic field with a high field strength is not doable. Giron is supposed to be pretty good, and so is MetGlas, but they cannot stop (deflect) all the field lines from a strong field. Highly permeable material is the best shielding. Magnetic lines of force like to travel through permeable materials. That's what permeable means - an easy (easier) route than through space, air, whatever, for magnetic lines of force. What these shielding materials are doing is giving the magnetic lines of force a place to travel other than through space or through whatever is being shielded. The field still exists, but it's concentrated inside the shielding. And the lines of force will reappear from inside the shielding material at its edges. What else would one expect? The shielding can't make the lines of force disappear. As it re-routes them, it means that it has to re-release them somehow. Field density at the edges of shielding will be high. The field is collected for re-routing and distributed back into space after re-routing at a shield's edges. The materials cited are passive shields. Active shields can be constructed, but they are most challenging to engineer. Active magnetic shielding is used in the machinery for magnetic resonance imaging (MRI), and it is an active winding that is driven by an electronics package so that it "cancels out" fields outside the main coil. It's a headache and a half to design and implement active shielding. No shielding can block, stop, or re-route all the magnetic field lines from a magnetic source. Some lines of force will not be re-routed through the shielding and will appear on the other side of it.
What will happen if the flow of hot rock in earths mantle if the planets core eventually cools?
The flow of hot rock in earths mantle will stop and Earth's magnetic field will disappear
How do electromagnetic brakes work?
Electromagnetic brakes work like this. The brake shoes are moved by solenoids. These solenoids actually keep the brakes OFF when power is going to them. When the electronic brake is actuated, the brake control decreases the amount of voltage going to the solenoids there fore allowing the brake to contact the brake drum. When the safety switch (break away switch) is activated, the battery in the supply box, provides full power forcing the brake pads against the drums causing the vehicle to stop immediately.
If you stopped the magnet midway through the loop what would happen?
The magnetic field generated by the magnet would also stop, causing the induced current in the loop to cease. This would result in a decrease in electromagnetic induction and the loop would have no current running through it.
Which metal is stop the magnetic field no effect in other side?
nothing can disrupt a magnetic feild
Why do compasses stop working when they are to close to metal objects?
Metal objects can interfere with the Earth's magnetic field around the compass, causing inaccurate readings. This is because the metal objects can create their own magnetic fields that disrupt the compass needle's ability to point towards the Earth's magnetic pole.
Will aluminum and bronze stop magnetic field as a magnetic shield?
Not at all well
Can a person magnetic field cause their watch to stop?
No, a person's magnetic field is not strong enough to stop a watch. However, strong magnetic fields from devices like speakers or magnetic clasps in bags can affect the accuracy of a watch. Specialized watches with anti-magnetic features are designed to withstand such interference.
When and magnetic fields exist its called an electromagnetic field?
A temporary magnetic field created by a flowing electrical current is an electromagnetic field. Stop the current from flowing, it goes away.
What does the Earth's magnetic field stop from hitting the Earth's surface?
Solar Winds
What material blocks a magnetic field?
There are no materials that STOP magnetic fields. Some have proposed that a faraday cage will stop magnetic fields, but this is not true because magnetism is a field, not a wave. The most effective way to block a magnetic field is to put a bunch of space between it and whatever's in trouble. Ideally, you could encase a magnet in a large plexiglass bubble to keep distance.
What makes iridium-copper alloy powerful so much so that it attracts rice grains or stop car engine?
Iridium-copper alloy is highly dense and has strong magnetic properties due to the presence of iridium. These properties can create a strong electromagnetic field, which can cause magnetic materials such as rice grains or certain electronic components in a car engine to be attracted or disrupted.
Can electromagnetic field stop magnetic waves?
Yes, an electromagnetic field can influence the propagation of magnetic waves by altering their direction or intensity, depending on the field's strength and orientation. However, it cannot completely stop magnetic waves as they still possess the ability to pass through certain materials and mediums.
Why do electro-magnets stop working when you flip the switch?
When you flip the switch to turn off the electromagnet, the flow of electric current stops, which in turn stops the magnetic field from being produced by the coil. The magnetic field is generated by the flow of electric current through the coil, so cutting off the current stops the magnetic field, causing the electromagnet to stop working.
How can you turn off a magnetic field by a current?
If the magnetic field is caused only by a current, you can turn the current off.If you have another magnetic field, for example due to a permanent magnet, with a current you can create a magnetic field that counters the first one. But that will only work in certain regions in space; you can't cancel such a magnetic field everywhere in space.
What will happen when the core stop moving?
If the Earth's core were to stop moving, it would lead to a lack of a magnetic field, which could expose the planet to harmful solar radiation, disrupt navigation systems, and impact electrical grids. The movement of the core is essential for generating the Earth's magnetic field, which provides crucial protection against these potential consequences.
